Initially, water is driven underground by gravity. What is the main driver after a certain depth?
Why do people favour groundwater to surface water sources?
When bacteria in the soil interacts with organic compounds in the water, what are they broken down into?
What happens if groundwater is depleted too fast?
Test results
Congratulations. You have passed the test and completed the 92 - Understanding our groundwater
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Q: Can groundwater be over a thousand years old?
A: No
Q: Can groundwater be over a thousand years old?
A: Yes
Q: Initially, water is driven underground by gravity. What is the main driver after a certain depth?
A: The main driver becomes pressure
Q: Initially, water is driven underground by gravity. What is the main driver after a certain depth?
A: The main driver is still gravity
Q: Initially, water is driven underground by gravity. What is the main driver after a certain depth?
A: Both pressure and gravity, depending on conditions
Q: Why do people favour groundwater to surface water sources?
A: Access to surface water is often limited for many due to land ownership
Q: Why do people favour groundwater to surface water sources?
A: They don't - lakes and rivers provide a much more reliable supply
Q: Why do people favour groundwater to surface water sources?
A: The cleaning effect from filtration through the subsurface makes groundwater much safer
Q: When bacteria in the soil interacts with organic compounds in the water, what are they broken down into?
A: Pollutants in the water
Q: When bacteria in the soil interacts with organic compounds in the water, what are they broken down into?
A: Nothing - this process happens on the surface
Q: When bacteria in the soil interacts with organic compounds in the water, what are they broken down into?
A: Pure water and CO2
Q: What happens if groundwater is depleted too fast?
A: The land subsides and a shallow lake forms
Q: What happens if groundwater is depleted too fast?
A: The land subsides and dries out
Q: What happens if groundwater is depleted too fast?
A: Water pressure drops, but in principle the aquifer is always there
Q: The rainwater which becomes new groundwater is called what?
A: Discharge
Q: The rainwater which becomes new groundwater is called what?
A: Replenish
Q: The rainwater which becomes new groundwater is called what?
A: Recharge